Indentation should be done with spaces, not with TABs, in the ARM subsystem
There are still a lot of old files in the QEMU ARM code base that use TABs for indentation instead of using 4 spaces in these files here:
include/hw/arm/omap.h include/hw/arm/soc_dma.h include/hw/arm/pxa.h include/hw/arm/sharpsl.h hw/char/omap_uart.c hw/intc/omap_intc.c hw/dma/omap_dma.c hw/dma/pxa2xx_dma.c hw/gpio/omap_gpio.c hw/gpio/zaurus.c hw/arm/nseries.c hw/arm/mainstone.c hw/arm/omap1.c hw/arm/pxa2xx.c hw/arm/pxa2xx_gpio.c hw/arm/omap_sx1.c hw/arm/omap2.c hw/arm/pxa2xx_pic.c hw/arm/boot.c hw/misc/omap_clk.c hw/misc/omap_sdrc.c hw/misc/max111x.c hw/misc/omap_l4.c hw/misc/omap_tap.c hw/misc/cbus.c hw/misc/mst_fpga.c hw/misc/omap_gpmc.c hw/input/tsc2005.c hw/input/tsc210x.c hw/input/lm832x.c hw/ssi/omap_spi.c hw/i2c/omap_i2c.c hw/sd/pxa2xx_mmci.c hw/sd/omap_mmc.c hw/timer/omap_synctimer.c hw/timer/omap_gptimer.c hw/timer/pxa2xx_timer.c tcg/arm/tcg-target.h
The TABs should be replaced, to make sure that we have a consistent coding style with an indentation of 4 spaces everywhere.